If you have an SFR iPhone under contract and would like to have it unlocked, there are many third party experts who offer you the unlock SFR iPhone services on all models. They can offer you permanent unlock factory code via iTunes so that you can use any GSM network of your choice. This is legal as the IMEI on your phone shall be registered as Unlock in the apple Database. So to avail the services to unlock SFR iPhone you need to first send them the IMEI code on your phone. For this you can either press *#06# on your keypad or go to settings/general/about screen and scroll down to look for IMEI code else eject the SIM tray to find the IMEI code. As you email this code to the unlock service providers they shall send you back the authentic code within 24 hours’ time. To Unlock SFR iPhone you have to install iTunes via internet connectivity with a not accepted SIM card and wait till iTunes detect the phone. You then have to disconnect the phone and connect it after 10 seconds to have your phone unlocked.
 

Similarly, if you have to unlock Movistar iPhone or unlock Optus iPhone or unlock Telenor iPhone the process is one way or the other same while the price may vary based on the models to offer the services of the unlock service providers. They can unlock all the iPhones irrespective of the model, whether in contract or out of contract iPhone. As you have availed the unlock Movistar iPhone services it remains unlocked even if you update the phone to future IOS versions. There is also no technical knowledge required to unlock Optus iPhone and can be done by following a few simple steps indicated by the unlock service providers. By availing the unlock Telenor iPhone services there are so many benefits as you can choose any network carrier in the world and also avoid roaming charges when abroad. Your phone resale value also increases if it is permanently unlocked.
 

You can also enjoy best solutions to unlock Tesco phone from the service providers who charge $41.99 for the unlock code. As the Tesco phone is locked to a single carrier you can get rid of that by sending the unlock service providers the IMEI code, phone carrier and phone model number details. As you receive the code, you first have to enter a non-carrier SIM in the phone and switch on the phone that prompts for a code. You have to enter the code till it asks for the PUK code and then enter the unlocking code purchased to have your phone unlocked permanently to use any carrier SIM cards in it.